麦克斯韦讲得电磁的故事（8）电流产生磁

<span>作者简介：郑玩相，1985年毕业于首尔大学，1992年在韩国科学技术院获得物理学博士学位。专攻重力理论和量子对称性应用数学，著有十几种广受欢迎的科普读物。&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span>&nbsp; <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</span> <span>&nbsp;</s...